Assembly Binding Redirection support

Now let's say you have two other libs, B and C, and both of these depend on A.

If B and C were to be built with different versions of A, how will he use B and C on our projects?

In the .NET Full Framework, we would use a .config file to make Assembly Binding Redirection (normally, we would point all versions of A to its most recent version), but this is not possible right now in Windows Phone... :(

As far as I can now, this affects the whole Silverlight Framework, not just Windows Phone...